"This commercial grade flat speed bottle opener is constructed of heavy duty 18/8 stainless steel and is used bar professional bartenders. The opener is well sized with its convenient flat design which makes for easy back pocket retrieval for quick opening of any beer bottles."...

"This commercial grade flat speed bottle opener is constructed of heavy duty 18/8 stainless steel and is used bar professional bartenders. The opener is well sized with its convenient flat design which makes for easy back pocket retrieval for quick opening of any beer bottles."

If it wasn't a wrench or for carying something, there were not many other choices left...BOINC WIKI